JPS63124270A - Optical disk control method - Google Patents

Abstract

PURPOSE:To adjust the capacity of an information recording area to the used conditions of an alternation area so as to change it by executing recording in one area from an outer periphery to an inner periphery when the recording in the other area is executed from the inner periphery to the outer periphery without previously area-dividing into an information recording area and the alternation area. CONSTITUTION:An optical disk consists of the information recording area 21 which starts from a track address O and the alternation area 22 which starts from a track address N. While accumulating recording data in a buffer 13, an address conversion circuit 12 transmits data to an optical disk interface 17 so that data are sequentially recorded from the track address O on the optical disk. A recording/reproducing control circuit 15 terminates a recording action for the alternation area 22 if they do not coincide. For recording data in the alternation area 22 in such a case, the address conversion circuit 12 is instructed to change to the address which starts from the track address N. Thus, the capacity of the information recording area has the efficiency that it increases several % at maximum.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an optical disc control method for managing information on a sector-by-sector basis.

Conventional technology When recording to a specific sector of an optical disc, an optical disc control device records information to a specific sector within the information recording area, and then reproduces the same sector to check whether the information has been recorded correctly. .

If the information was recorded correctly, the recording operation will be completed, but
If the information cannot be recorded correctly, the same information is recorded using a replacement sector in the replacement area. After that, the replacement sector is played back to check whether the information was recorded correctly. This operation is repeated in the alternate sector until the information is finally recorded accurately, and the recording operation is completed.

By the way, conventionally, in an optical disc, an information recording area and a spare area have been divided in advance. Furthermore, when recording information in two areas, when one area records from the inner circumference to the outer circumference, the other area also records in the same direction.

Furthermore, the capacity of one spare area is based on an optical disk with many bad sectors, taking into account the variations between optical disks.
They were allotted lots of money with plenty of leeway.

Problems to be Solved by the Invention However, since the total capacity of the two areas, the information recording area and the spare area, is fixed, the information recording area and the spare area are divided in advance so that each area can be divided into two areas. It also determines the capacity of

Therefore, for optical discs with few defective sectors in the information recording area, the usage rate of the spare area decreases, and unused areas remain in the spare area.

Therefore, there is a problem in that the usage rate of the optical disc as a whole decreases.

In view of the above problems, the present invention provides an optical disc control method that can change the capacity of an information recording area in accordance with the usage status of a spare area.

Means for Solving the Problem In order to achieve this objective, instead of dividing the information recording area and the spare area into areas in advance, recording is performed in one of the two areas, the information recording area and the spare area. When recording is performed from the inner circumference toward the outer circumference, recording in other areas is performed continuously from the outer circumference toward the inner circumference.

Effect of the Invention The present invention uses the method described above to make the capacity of the spare area and the information recording area variable depending on the number of bad sectors existing in the information recording area, since the information recording area and the spare area are not divided in advance. Therefore, when the number of defective sectors is small, the capacity of the information recording area can be increased.

Further, even if the number of bad sectors increases, since the two areas are not divided, there will be no shortage of spare areas, and it is possible to provide an optical disk control device that can handle optical disks with many bad sectors.

EXAMPLE An example of the present invention will be described below with reference to the drawings.

FIG. 1 shows the basic configuration of an optical disc control device in an embodiment of the present invention, and FIG. 2 shows the configuration of an optical disc.

As shown in Figure 2, the optical disc has a track address of O
It is composed of an information recording area 21 starting from , and a replacement area 22 starting from track address N. Each track is made up of several sectors.

In the recording operation, first, the host interface 11 shown in FIG. 1 gives a recording command to the recording/reproduction control circuit 16, address data to the address conversion circuit 12, and recording data to the data buffer 13. The address conversion circuit 12 provides the converted address to the optical disc drive interface 17 so that data is sequentially recorded from track address 0 on the optical disc. Recorded data.

The data is also sent to the optical disc drive interface 17 while being stored in the data buffer 13. The recording/reproduction control circuit 15 sends a control signal for controlling the optical disc drive to the optical disc drive interface 17 at appropriate timing. In this manner, an operation command is given to the optical disc drive connected to the optical disc drive interface 17 to record data on the optical disc.

Next, in order to check whether the data has been accurately recorded, the recording/playback control circuit 15 gives a control signal for playing back the recorded data to the optical disk drive interface 17, and receives the playback signal from the optical disk drive. Data is transferred to the data buffer 14 through the optical disk drive interface 17 . After that, the data buffer 13
The data comparison circuit 1θ compares the data in the data buffer 14 with the data in the data buffer 14, and sends the result to the recording/reproduction control circuit 16.

If the data match, the recording/reproduction control circuit 15
The recording operation ends, but if they do not match, the recording operation to the spare area 22 is performed. In this case, in order to record data in the spare area 22, the recording/playback control circuit 16 instructs the address conversion circuit 12 to give the optical disc drive interface 17 an address after converting it to an address starting from the track address K. command.

After the recording operation to the spare area 22 is completed, the reproduction operation is performed, and the data buffer 13 and the data buffer 14 are
The operation is repeated within the replacement area 22 until the data contents match.

Note that the track addresses used in the information recording area 21 and spare area 22 of the optical disc are held in a memory within the address conversion circuit 12.

Effects of the Invention As described above, according to the present invention, the capacity of the spare area prepared for defective sectors in the information recording area is usually about a few tenths of the capacity of the information recording area. The capacity of the area has the effect of abusing several percent at maximum.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an optical disc control device that implements an optical disc control method according to an embodiment of the present invention, and FIG. 2 is an address state diagram of each area showing the configuration of the optical disc. 11...Host interface, 12...
... Address conversion circuit, 13.14 ... Data buffer, 16 ... Recording/playback control circuit, 16
...Data comparison circuit, 17...Optical disc drive interface, 21...Information recording area 122...Alternative area. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
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Claims (1)

[Claims] Information is recorded on an optical disk that has two areas: an information recording area with sectors for recording and reproducing specific units of information, and a spare area having spare sectors for recording and reproducing information as a substitute for bad sectors in the information recording area. When doing this,
An optical disc control method characterized in that information is continuously recorded in one area from the inner circumference to the outer circumference and in the other area from the outer circumference to the inner circumference.